// This source code is dual-licensed under the Apache License, version
// 2.0, and the Mozilla Public License, version 2.0.
//
// The APL v2.0:
//
//---------------------------------------------------------------------------
//   Copyright (c) 2007-2025 Broadcom. All Rights Reserved.
//
//   Licensed under the Apache License, Version 2.0 (the "License");
//   you may not use this file except in compliance with the License.
//   You may obtain a copy of the License at
//
//       https://www.apache.org/licenses/LICENSE-2.0
//
//   Unless required by applicable law or agreed to in writing, software
//   distributed under the License is distributed on an "AS IS" BASIS,
//   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//   See the License for the specific language governing permissions and
//   limitations under the License.
//---------------------------------------------------------------------------
//
// The MPL v2.0:
//
//---------------------------------------------------------------------------
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at https://mozilla.org/MPL/2.0/.
//
//  Copyright (c) 2007-2025 Broadcom. All Rights Reserved.
//---------------------------------------------------------------------------

using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace RabbitMQ.Client
{
    public class PlainMechanism : IAuthMechanism
    {
        public async Task<byte[]> HandleChallengeAsync(byte[]? challenge, ConnectionConfig config,
            CancellationToken cancellationToken = default)
        {
            ICredentialsProvider credentialsProvider = config.CredentialsProvider;
            Credentials credentials = await credentialsProvider.GetCredentialsAsync(cancellationToken)
                .ConfigureAwait(false);
            return Encoding.UTF8.GetBytes($"\0{credentials.UserName}\0{credentials.Password}");
        }
    }
}
